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6/15/11 10:46am - Original Message: '1980 L-48 hesitation'
kwgilf
Former Member
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Kentwood, MI - USA

Vette(s):
Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.

Joined: 6/11/2011
Posts: 10
While cruising, not while accelerating, there is a very slight hesitation. When the A/C is on, this is more noticeable. Any ideas what is causing this?
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6/15/11 1:14pm - Reply: '1980 L-48 hesitation'
aceinthehole Lifetime Member
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Valley Springs, CA - USA

Vette(s):
1978,Metalic Money Green W/Gold emblems,TH350 w/gear splitter,black & grey interior.1978,two tone,Metalic Rootbeer & gold ,Doeskin interior,auto. trans. 1981, Silver w/mirrored T-Tops,4 spd, charcoal interior.

Joined: 11/20/2005
Posts: 3618
Hi Kevin, need a little more description. Do you mean as you are cruising at a steady speed, without depressing the acceleratorthe motor coughs or stutters or something ?

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Jimmy B.
Just can't wait to get on the road again.

 
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6/15/11 1:35pm - Reply: '1980 L-48 hesitation'
kwgilf
Former Member
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Kentwood, MI - USA

Vette(s):
Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.

Joined: 6/11/2011
Posts: 10
Yes, cruising at a steady speed without depressing the accelerator. It doesn't cough or stutter, just a slight rhythmic hesitation that is more noticeable when the A/C is on. I replaced the fuel filter and it did not improve.

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Lady Luck
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6/15/11 1:41pm - Reply: '1980 L-48 hesitation'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
[QUOTE=kwgilf] just a slight rhythmic hesitation that is more noticeable when the A/C is on. [/QUOTE]

Are you sure what your feeling is NOT the A/C compressor kicking in/out?
Other than that, it could be the EGR valve, or the solenoid for it not operating properly....


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Joel Adams
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6/15/11 3:31pm - Reply: '1980 L-48 hesitation'
kwgilf
Former Member
- Send Private Message


Kentwood, MI - USA

Vette(s):
Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.

Joined: 6/11/2011
Posts: 10
It also hesitates when the A/C is off, just not as noticeable.

____________________________________

Lady Luck
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6/22/11 8:57pm - Reply: '1980 L-48 hesitation'
kwgilf
Former Member
- Send Private Message


Kentwood, MI - USA

Vette(s):
Currently own: 1980 L-48 automatic. Custom painted in gray metal flake with silver hood accent. Oyster interior. Previously owned: 1976 silver Sting Ray with black interior. 1980 L-48 black with oyster interior.

Joined: 6/11/2011
Posts: 10
Broke down and took it to a mechanic. EGR Valve was ok, carb was running too lean. Adjusted carb and everything is good. Thanks all for the comments, 

____________________________________

Lady Luck
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